×

Annular mask lens having diffraction reducing edges

  • US 5,905,561 A
  • Filed: 06/14/1996
  • Issued: 05/18/1999
  • Est. Priority Date: 06/14/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A lens adapted to be worn on or implanted in the eye, comprising:

  • a central portion of selected transmissivity such that the central portion transmits more light energy at a center of the central portion and less light energy toward an outer region of the central portion; and

    an annular mask region surrounding the central portion wherein the annular mask region adjacent to the outer region of the central portion has a transmissivity below which the annular mask region functions as essentially opaque, remains at that amount of transmissivity or less for a distance in the range of about 0.5 millimeters to about 4.0 millimeters, then increases in transmissivity until reaching an outer edge of the annular mask region of the lens.

View all claims
  • 10 Assignments
Timeline View
Assignment View
    ×
    ×